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combi boiler?

ravenheat boiler.
works fine when air allowed to circulate when removing front. replace cover and it shuts down.
johnny, September 2009
most likely slow fan, blocked venturi, or faulty air pressure switch.

Ian, September 2009
Lazy fan or blocked flue. Please get a registered engineer to look at it.

J, September 2009
link Click here to see other fixes for Ravenheat.